Methods and systems are provided for determining relative priorities of wireless communication devices with respect to controlling controllable devices. The high-frequency power amplifier comprises, over a semiconductor chip, a bias control circuit, a bias transistor and an amplification transistor which are coupled so as to configure a current mirror circuit, and a gate length monitor circuit comprising a replicating transistor. The marking ink for the covered electrical conductor contains an acrylate resin with molecular weight of 10,500-93,000.